Sample carrier with adhesive tape for the analysis of powders by means of a guinier x-ray camera



Feb. 28, 1967 G. BOUVELLE 3,307,036

SAMPLE CARRIER WITH ADHESIVE TAPE FOR THE ANALYSIS OF POWDERS BY MEANSOF A GUINIER X-RAY CAMERA Filed Nov. 26, 1963 2 Sheets-Sheet 1 INVENTOKGeorges BOUVELLE A TTORNEYS G. BOUVELLE [H ADHESIVE TAPE FOR THEANALYSIS Feb. 28, 1967 SAMPLE CARRIER WI 0F POWDERS BY MEANS OF AGUINIER X-RAY CAMERA Filed Nov. 26, 1963 2 Sheets-Sheet 2 INVENTORGeorges BOUVELLE ATTORNEY United States Patent C) SAMPLE CARRiER WITHADHESIVE TAPE FOR THE ANALYSIS OF POWDERS BY MEANS OF A GUIWEER X-RAYCAMERA Georges Bouveile, Olginasio di Besozzo, Varese, Italy, assignorto European Atomic Energy Community- Euratom, Brussels, Belgium FiledNov. 26, 1963, Ser. No. 325,972

Claims priority, application Belgium, Dec. 11, 1962,

Claims. (a. 2s0 s1.s

The present invention intends to improve and facilitate the preparationof the diffraction analysis of several powder samples by a Guinier X-raycamera.

The invention stems from two existing types of sample carriers thefeatures of which consist in that the analysis window is integral withthe base support of the sample carrier and in that the window hasmarkings thereon determining the limits between which the three powdersto be analyzed are deposited on the adhesive strip. The strip isretained by a frame secured to the base support by means of four screws.

This type of sample carrier is used for transmission analysis as well asreflection analysis.

In using these sample carriers, it appeared desirable to have availablea carrier wherein the separation between the powders would be moredefinite and clear and, more important still, a carrier wherein thewindow and the base support would operate independently.

The sample carrier of the invention, which has a known rectangular frameas a base support, answers these requirements. It is characterized bythe provision of an experimentation frame capable of being removablysecured on the base support and provided with two window partitioningbars dividing the free space of the frame into three separate areas, theframe serving, at the same time, to receive the adhesive strip.

The sample carrier of the instant invention has the followingadvantages:

(1) Depositing of the various powders is made easier by the partitioningeifect of the bars. There is no danger of mixing the powders to beanalysed. The bars being in the optical path of the inner diaphragms ofthe Guinier camera, they do not influence the X-ray beam.

(2) The experimentation frame with its partitioning bars isinedependent, that is, separable from the base support of the samplecarrier.

(3) The adhesive strip, with its powders to be analysed, is glued on theexperimentation frame and no longer on the base support. The frame mayconsequently be preserved as is for a further analysis.

(4) The operator may have an array of different types of experimentationframes (transmission, reflection) and may thus prepare the sampleswithout having to tie up the base supports themselves.

The invention will be better understood by the description that followsof a preferred, although non-limitative, embodiment of the inventionhaving reference to the appended drawings wherein:

FIG. 1 is a plan view of the base support of the sample carrier of theinvention;

FIG. 2 is a longitudinal cross-sectional view along line 22 of FIG. 1;

FIG. 3 is a plan view of the experimentation frame of the samplecarrier;

FIG. 4 is a plan view of the complete sample carrier according to theinvention.

FIGURE 5 is a schematic elevation view of a known apparatus for theX-ray diffraction analysis of powder samples and with which the samplecarrier of the invention is used;

FIGURE 6 is a cross-sectional view of the Guinier X-ray camera, takenalong line VIVI of FIGURE 5.

In FIGS. 1 and 2, the base support of the sample carrier is formed as arectangular frame 1 provided with lateral shoulders 2, forward chamferedabutments 3, a hole 4 for the securement of a clamping member 5 (seeFIG. 4) at the rear end thereof and an opening 6 for the passage ofX-rays through the center of the support.

According to the invention, the experimentation frame 7 (see FIG. 3) isadapted to be releasably secured on the base support 1 and provided withwindow bars 8 dividing the opening of the frame into separate areas 9.The securement of the frame on the support is obtained by means of thecooperating shoulders 2 and eccentric clamp 5, as illustrated in FIG. 4.The clamp may be operated by means of a wing key.

Grooves 10 on the experimentation frame according to FIG. 3 are used forcutting the adhesive strip which is disposed over the upper face of theframe.

FIG. 4 illustrates the operating cam or eccentric clamp 5, rotating intoits initial clamping position and locking the experimentation frame 7 onthe base support 1. The angle of inclination of the conical edge of theclamping cam is 60 and so is that of the chamfered edges of theexperimentation frame.

The base sup-port being made of brass, the experimentation frame is madeof stainless steel. Two similar frames have been provided, one for thetransmission analysis and the other for the reflection analysis. The twoframes only differ in the length of the windows; besides, they aresymmetrical in order to avoid the necessity of an adjustment.

The sample carrier of the invention is to be used on a known apparatusfor the X-ray refraction analysis of powder samples as shown in FIGURES5 and 6.

This apparatus comprises a Guinier camera 11 mounted on a tripod 12provided with levelling means 13. Camera 11 has a main body 14 fast witha ring 15 slidably mounted on a disk 16, the latter being secured to thetripod 12. The camera body 14 defines a pair of exposure chambers 17and, for each chamber 17, a plurality of Xray windows 18 leading intosaid chamber. The films 19 are themselves retained in the exposurechambers by means of resilient split rings 20.

The sample carrier, denoted in FIGURES 5 and 6 by the capital letter C,are held against the camera by any known means such as the slideways 21and so positioned that the openings 6 through the base support 1 for thepassage of X-rays corresponds to the X-ray window 18 against which thesample carrier is applied.

The source of X-rays is from a generator 22 having an emitter head 23.The rays from head 23 are diverted by means of rotating crystal 24.

I claim:

1. In an apparatus for the X-ray diffraction analysis of powder samples,the combination comprising:

(I) a linear X-ray camera having a main body defining a film exposurechamber and an X-ray leading into said chamber;

(II) an X-ray source to emit X-rays through said X- ray opening;

(III) a sample carrier mounted across said X-ray opening, said carriercomprising:

(a) a base support having a central opening for the passage of X-rays,said central opening corresponding to said camera X-ray window;

(b) an experimentation frame for the reception of powders to beanalyzed; said frame slidably mounted over said support and removablysecured thereto;

(c) said frame having a window adapted to register with said opening,and

(d) bars extending across said window to divide the said window intoseparate areas, and

(e) an adhesive strip fixed over said frame.

2. In an apparatus for the X-ray diffraction analysis of powder samples,the combination comprising:

(1) a linear X-ray camera having a main body defining a film exposurechamber and an X-ray window leading into said chamber;

(II) an X-ray source to emit X-rays through said X- ray Opening;

(III) a sample carrier mounted across said X-ray opening, said carriercomprising:

(a) a base support having guiding and clamping means along the edgesthereof and an opening substantially centrally thereof for the passageof X-rays, said central opening corresponding to said camera X-raywindow;

(b) an experimentation frame for the reception of powders to beanalyzed; said frame slidably mounted over and clamped to said basesupport in predetermined position by means of said guiding and clampingmeans;

(0) said frame having a window therethrough adapted to register with theopening through said base support; and

(d) at least two substantially parallel bars mounted thereon to dividesaid window into three separate areas, and

(e) an adhesive strip fixed over said frame.

3. In an apparatus for the X-ray diffraction analysis of powder samples,the combination comprising:

(I) a linear X-ray camera having a main body defining a film exposurechamber and an X-ray window leading into said chamber;

(II) an X-ray source to emit X-rays through said X- ray opening;

(III) a sample carrier mounted across said X-ray opening, said carriercomprising:

(a) a rectangular base support having guiding and abutment shouldersalong three edges thereof and a central opening therethrough for thepassage of X-rays, said central opening corresponding to said cameraX-ray window;

(b) an experimentation frame for the reception of powders to beanalyzed; said frame adapted to be slidably mounted over said supportsnugly between said shoulders and having a window adapted to registerwith the opening through said support when mounted thereover;

(c) at least two substantially parallel bars mounted across said windowto divide said window into three separate areas, and

(d) means along the fourth edge of said base support to clamp said framethereover and against said abutment flange, and

(e) an adhesive strip glued over said frame.

4. A sample carrier, as claimed in claim 3, wherein the inner faces ofsaid shoulders in relation to said opening are outwardly and downwardlyinclined and the four edges of said experimentation frame arecorrespondingly inclined, and wherein said means is an eccentricrotatable disc mounted on the fourth edge of said base support; theperipheral face of said disc being so chamfered and positioned inrelation to the adjacent inclined edge of said frame as to cause thesaid frame to move between the guiding shoulders and to abut theabutment shoulder and to be clamped to said base support.

5. A sample carrier as claimed in claim 4, wherein said frame has twotransverse grooves, one on each side of said window, for cutting offsaid adhesive strip glued thereover.

References Cited by the Examiner UNITED STATES PATENTS 2,025,488 12/1935Chu-Phay Yap 250'51.5 2,317,312 4/1943 Swanson et al. 49449 2,317,3294/1943 McLachlan 250-515 2,499,019 2/1950 Dornfeld 250-495 2,993,9927/1961 Craig 250-4l.9

RALPH G. NILSON, Primary Examiner.

A. L. BIRCH, Assistant Examiner.

3. IN AN APPARATUS FOR THE X-RAY DIFFRACTION ANALYSIS OF POWDER SAMPLES,THE COMBINATION COMPRISING: (I) A LINER X-RAY CAMERA HAVING A MAIN BODYDEFINING A FILM EXPOSURE CHAMBER AND AN X-RAY WINDOW LEADING INTO SAIDCHAMBER; (II) AN X-RAY SOURCE TO EMIT X-RAYS THROUGH SAID XRAY OPENING;(III) A SAMPLE CARRIER MOUNTED ACROSS SAID X-RAY OPENING, SAID CARRIERCOMPRISING: (A) A RECTANGULAR BASE SUPPORT HAVING GUIDING AND ABUTMENTSHOULDERS ALONG THREE EDGES THEREOF AND A CENTRAL OPENING THERETHROUGHFOR THE PASSAGE OF X-RAYS, SAID CENTRAL OPENING CORRESPONDING TO SAIDCAMERA X-RAY WINDOW; (B) AN EXPERIMENTATION FRAME FOR THE RECEPTION OFPOWDERS TO BE ANALYZED; SAID FRAME ADAPTED TO BE SLIDABLY MOUNTED OVERSAID SUPPORT SNUGLY BETWEEN SAID SHOULDERS AND HAVING A WINDOW ADAPTEDTO REGISTER WITH THE OPENING THROUGH SAID SUPPORT WHEN MOUNTEDTHEREOVER; (C) AT LEAST TWO SUBSTANTIALLY PARALLEL BARS MOUNTED ACROSSSAID WINDOW TO DIVIDE SAID WINDOW INTO THREE SEPARATE AREAS, AND (D)MEANS ALONG THE FOURTH EDGE OF SAID BASE SUPPORT TO CLAMP SAID FRAMETHEREOVER AND AGAINST SAID ABUTMENT FLANGE, AND (E) AN ADHESIVE STRIPGLUED OVER SAID FRAME.